Plane Wave Methods for Quantum Eigenvalue Problems of Incommensurate Systems

Plane Wave Methods for Quantum Eigenvalue Problems of Incommensurate Systems
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不通约系统量子本征值问题的平面波方法

DOI:
10.1016/j.jcp.2019.02.003
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发表时间:
2018-11
影响因子:
4.1
通讯作者:
Aihui Zhou
Aihui Zhou
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yuzhi Zhou;Huajie Chen;Aihui Zhou

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本文提出了一种新的数值算法来计算与电子结构相关的无公度系统的本征值问题。不同于传统的做法,近似系统的一个大的公度超胞,我们的算法直接离散的特征值问题的框架下的平面波方法。与我们所熟悉的周期系统相比,新出现的遍历性和从更高维度的解释产生了许多独特的特征。对一维和二维量子本征值问题的数值计算结果表明了算法的可靠性和有效性。此外,我们的算法扩展到全Kohn-Sham密度泛函理论计算进行了讨论。
We propose a novel numerical algorithm for computing the electronic structure related eigenvalue problems of incommensurate systems. Unlike the conventional practice that approximates the system by a large commensurate supercell, our algorithm directly discretizes the eigenvalue problems under the framework of a plane wave method. The emerging ergodicity and the interpretation from higher dimensions give rise to many unique features compared to what we have been familiar with in the periodic systems. The numerical results of 1D and 2D quantum eigenvalue problems are presented to show the reliability and efficiency of our algorithm. Furthermore, the extension of our algorithm to full Kohn-Sham density functional theory calculations is discussed.
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